Air gap storage

[Fredagscola]

Hello,

I'm about to build a storage shed.
The idea is for it to be insulated and have horizontal paneling, but now I'm stuck on how the wall is built.
The studs will be 45x95, with weather protection stapled on top,
then 28x70 nail battens to create an air gap between the horizontal paneling and the weather protection/stud.

Now to the question, should there be an open air gap like in image 1 (and with a gap between the wall panel and the roof where the wall panel and roof overhang meet) so it can "vent freely" in the air gap?

Or do you place a crosswise nail batten like in image 2 and "seal off" the air gap (and build the wall panel flush against the underside of the roof overhang)?

I've always thought it should be like in image 1, but I've checked under a few panels and some have a crosswise nail batten that seals it off.

Image 1


Image 2

 

[tompax]

Hello,

Planning to build a storage shed.
The idea is for it to be insulated and have horizontal paneling, and now I'm stuck on how to construct the wall.
The studs will be 45x95, with a wind barrier stapled on.
Then 28x70 battens will be used to create an air gap between the horizontal paneling and the wind barrier/studs.

Now to the question, should there be an open air gap like in image 1 (and then with a gap between the wall panel and roof where the wall panel and roof overhang meet) so that it can "freely blow" in the air gap

Or do you install a cross batten like in image 2 and "seal" the air gap (and build the wall panel flush with the underside of the roof overhang)?

I've always thought it should be like in image 1, but upon checking a few panels, some have a cross batten sealing it.

Image 1
[image]

Image 2
[image]

I would have done according to number 2. And usually do according to number 2.
If the panel installation and nailing are done well, I see no problem with enclosing the air. Because if done correctly, there should be no water intrusion.
If the panel is very poorly installed so it's loose and water gets in, etc., then it's an advantage for the air to blow freely behind, but in that case, you might as well tear down the panel anyway, as water shouldn't be getting in.

There are those who believe it should be open, and there are those who do as in picture number 2 but drill some holes to still allow ventilation through.

I also think it depends a bit on where you live in the country. It's the same with air gaps in roofs. In some cases, there's no right or wrong, and both methods can be equally right or wrong.

 

[Fredagscola]

I would have done according to number 2. And I also usually do according to number 2.
If the panel mounting and nailing are well performed, then at least I don't see any obstacle to enclosing the air. Because if it's done right, no water should get in.
If the panel is very poorly installed, so it's sparse and water leaks in, etc., then it is an advantage for the air to flow freely behind. But in that case, you might as well tear down the panel anyway, because water shouldn't be flowing in there.

There are those who believe it should be open and there are those who do as in image number 2 but drill some holes so it still ventilates.

I also think it depends a bit on where in the country you live. The same applies to air gaps in roofs. In some situations, there is no right or wrong, and both methods can be just as right or wrong.

Great, thank you for the good advice! As a bonus, I got ideas on how I can insulate the storage that already exists on the property

 

[tompax]

Great, thanks for the good advice! As a bonus, I got ideas on how I can insulate the storage that already exists on the property

Also preferably use wind protection fabric of the highest water tightness class (W1). A bit more expensive, but then the frame is secured against moisture. Class W2 and worse unfortunately allow water through quite significantly.